To calculate the average speed of the car, we need
B. The total distance driven on the racetrack
Explanation:
The average speed of an object in motion is given by
where
d is the distance covered by the object
t is the time interval considered to calculate the speed
The SI units of the speed are metres per second (m/s).
In this problem, we know the time interval:
t = 30 s
Therefore, in order to find the average speed, by looking at the equation we see that we also need the total distance driven by the car, so the correct answer is
B. The total distance driven on the racetrack
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